I ride a lot in the summer. I’m used to heat. I ride wearing gym shorts and a t-shirt.
Today was not hot: Sunny, but mid forties to low fifties. Not the best weather for thin shorts. I did adjust my clothing a tiny bit: I wore a long sleeved shirt. That helped my arms, but did nothing for my fingers or ears, which were mad at me for most of the ride.
Tomorrow: gloves!